An air valve dynamic performance testing device and testing method

Abstract

The invention relates to a testing device for dynamic performance of an air valve, and a testing method. The testing device comprises a water pump, a first switching valve, a pressurizing tank, an electromagnetic flowmeter, the tested air valve, a second switching valve and a third switching valve which are sequentially mounted on a test pipeline in the normal water flowing direction. The tested air valve and the second switching valve are mounted at the highest position of the test pipeline. The pressurizing tank is externally connected with an air storage tank, a rapid switching valve is mounted between the pressurizing tank and the air storage tank, and the air storage tank is externally connected with an air compressor for pressurizing the air storage tank and a vacuum pump for depressurizing the air storage tank. A first pressure sensor is arranged at an inlet of the tested air valve, and a displacement sensor used for detecting the displacement amount of a valve element is mounted on the valve element of the tested air valve. According to the testing device for the dynamic performance of the air valve, and the testing method, gas and liquid two-phase test media can be utilized, and the motion state of the gas and liquid two-phase test media is completely consistent with the motion state of a fluid in the pipeline under the real working condition; performance testing dataof the air valve are more realistic and more reliable; and the testing method is simple, easy to control and high in testing precision.

Description

technical field [0001] The invention belongs to the technical field of air valve performance testing, and in particular relates to an air valve dynamic performance testing device and a testing method. Background technique [0002] The air valve is an important water hammer protection device in long-distance water transmission projects, and it is usually installed at the highest point where liquid column separation may occur. When the pipeline is filled with water for the first time, the air in the pipeline is removed in time when the water is inspected and repaired, so as to effectively prevent the occurrence of bridging water hammer. When there is negative pressure in the pipeline, the air can be replenished in time to eliminate the phenomenon of liquid column separation and avoid accidents. The air intake performance and exhaust performance of the air valve are the main factors to measure the performance of the air valve. At this stage, the performance of the air valve is...

AI Technical Summary

Problems solved by technology

Existing air valve intake performance and exhaust performance tests are carried out using two separate sets of equipment, there is no integrated equipment that can simultaneously complete the suction and exhaust measurements, and the test devices in the prior art all use straight test pipelines At the same time, the experimental medium is a single air source medium, which is quite different from the actual working conditions of the air valve.

Images